Estalian

Estalian is official language of the humans of Estalia and the various Estalian colonies south of the United States of Hammerica.
Because the Wild West is where Estalian culture meets, New Kislevite culture, many humans and non-humans alike learn the language.
By an astonishing coincidence, Estalian sounds very similar to real world Spanish with a bit of old Western slang mixed in.